linux-kernel - Re: [GIT PULL] vfs mount

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Message-ID: <CAHk-=wgtKqZoQZB6VzJr+EQNfsT1r1A9U2zxOrGFb+pqtkTXFA@mail.gmail.com>
Date: Mon, 7 Apr 2025 09:00:10 -0700
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Christoph Hellwig <hch@...radead.org>
Cc: Mateusz Guzik <mjguzik@...il.com>, 
	James Bottomley <James.Bottomley@...senpartnership.com>, 
	Christian Brauner <brauner@...nel.org>, Leon Romanovsky <leon@...nel.org>, pr-tracker-bot@...nel.org, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] vfs mount

On Mon, 7 Apr 2025 at 01:51, Christoph Hellwig <hch@...radead.org> wrote:
>
> The scoped one with proper indentation is fine.  The non-scoped one is
> the one that is really confusing and odd.

Ahh, I misunderstood you.

You're obviously right in a "visually obvious" way - even if it was
the scoped one that caused problems.

But the non-scoped one is *so* convenient when you have a helper
function that just wants to run with some local (or RCU) held.

There's a reason we have more than two _thousand_ uses of it by now in
the kernel (~4x as many as the scoped version). It's just makes code
look so much simpler.

I was nervous about the lock guard macros initially, but it really
does get rid of pointless boilerplate code. Even without error
handling complications it just makes code simpler.

          Linus